The need: Often there is a requirement where data in a particular
table has to be processed, and the data processing might be slow,
while the table might be a one that is used by your application
extensively. For example, a logging table that logs page hits. Or
there might be an archiving operation that has to be performed on
a particular table. Archiving / processing / aggregating records,
all these operations are slow and can really blog down a website,
combine that with the added overhead if the table that needs to
have these operations performed is one that...

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